AF1981
Air, Secondary
Cummins®

Introduction

The Cummins AF1981 Secondary Air System is designed to enhance the operational efficiency of heavy-duty trucks. This system is integral to the overall performance of diesel engines, particularly in managing emissions and improving engine performance. By injecting air into the exhaust stream during cold starts, the AF1981 system aids in the reduction of harmful emissions and supports the efficient operation of the engine ¹.

Basic Concepts of Secondary Air Systems

Secondary air systems in diesel engines serve to introduce additional air into the exhaust stream, primarily during the cold start phase. This additional air helps to oxidize unburned hydrocarbons and carbon monoxide, thereby reducing emissions ². The system typically consists of an air pump, air injection valves, and associated control systems that regulate the flow of air based on engine conditions.

Purpose and Functionality of the AF1981 Secondary Air System

The AF1981 Secondary Air System is specifically engineered to enhance the combustion process in diesel engines. By supplying extra air to the exhaust during cold starts, it ensures that the catalytic converter reaches its operating temperature more quickly. This results in improved emissions control and supports the engine’s overall performance. The system also contributes to the reduction of engine wear by promoting more complete combustion ³.

Key Features of the AF1981 Secondary Air System

The AF1981 system incorporates several design elements that enhance its performance. These include a robust air pump capable of delivering the required airflow, precision-machined air injection valves for accurate air delivery, and a control module that monitors engine conditions to optimize air injection. The system is constructed using durable materials to withstand the harsh environments typical of heavy-duty truck operations.

Benefits of Using the AF1981 Secondary Air System

Incorporating the AF1981 Secondary Air System into truck operations offers several advantages. It contributes to improved engine efficiency by ensuring more complete combustion, particularly during cold starts. This results in reduced emissions, helping trucks meet stringent environmental regulations. Additionally, the system supports overall engine performance, potentially leading to extended engine life and reduced maintenance costs.

Installation and Integration

When installing the AF1981 Secondary Air System, it is important to consider compatibility with the specific truck model. The system should be integrated with the existing engine control unit (ECU) to ensure seamless operation. Proper installation involves securing the air pump and injection valves in optimal locations within the exhaust system, following manufacturer guidelines to ensure effective performance.

Maintenance and Troubleshooting

Regular maintenance of the AF1981 system is crucial for its longevity and optimal performance. This includes periodic checks of the air pump and injection valves for signs of wear or damage. Troubleshooting may involve verifying the operation of the control module and ensuring that the system is receiving the correct signals from the ECU. Prompt attention to any issues can prevent more significant problems down the line.

Regulatory Compliance and Emissions Standards

The AF1981 Secondary Air System plays a role in helping trucks meet current emissions standards. By reducing the levels of unburned hydrocarbons and carbon monoxide during cold starts, the system supports compliance with environmental regulations. Cummins provides relevant certifications and compliance details to ensure that the system meets all necessary standards.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins is committed to innovation and sustainability in the automotive industry. The company’s product range includes engines and components for on-highway, off-highway, and stationary applications, all designed to meet the demanding requirements of modern transportation and power generation.

Conclusion

The Cummins AF1981 Secondary Air System is a vital component for enhancing the performance and efficiency of heavy-duty diesel engines. By improving combustion during cold starts, this part not only reduces emissions but also supports overall engine health and longevity. Proper installation, regular maintenance, and adherence to regulatory standards are essential for maximizing the benefits of this Cummins part.